Spray aerator



June 27, 1961 B. BLUMBERG ET AL 2,990,122

SPRAY AERATOR Filed Feb. 14, 1961 2 Sheets-Sheet 2 56 sf 29 Y ze 24 30dl ZZ 3/ 5 ggz FIG. 5

Hon/a rd P05/7er INVENToRs.

"MyW

ATTORNEY 2,990,122 SPRAY AERA'IOR Benjamin Blumberg, 1851 E. 16th St.,Theodore Taubman, 532 Georgia Ave., and Howard Posner, 1851 E. th St.,all of Brooklyn, N.Y.

Filed Feb. 14, 1961, Ser. No. 89,315 10 Claims. (Cl. 239-441) Thisinvention rela-tes to a liquid ilow regulating device.

The invention is particularly concerned with a device for regulating the110W of a liquid such as water so as to produce a spray or aeratedstream thereof, as desired.

The availability of such a lluid iiow is desirable for many purposes.Thus, for example, for cleaning purposes, it is often desirable to makeuse of the mechanical action of a spray to loosen dirt and debris from asurface to be cleaned and thereafter to make use of an aerated strearnwhich, in conjunction with a soap or detergent or the like, can producea soapy foam and thereby accom.- plish an eilectivecontaot with suchsurface. Such a iluid ow may be utilized to advantage in the cleaning ofhousehold articles such las dishes, pots, pans and the like.

The availability of such a iiuid ilow is also desirable for the purposeof washing and shampooing the scalp and hair. Thus, the mechanicalaction of the aforesaid spray may be utilized to provide an invigoratingmassage to the `scalp andthe aerated stream may be alternately employedto produce an abundant and penetrating soapy foam for shampooing thehair and scalp.

It is therefore an object of the present invention to provide a devicecapable of producing alternately a fluid ow in the nature of a liquidspray or an aerated stream, as desired. i

`In, producing aerated liquids by conventional aerators attached to afaucet or other supply, of liquid, it has been observed` that many ofsuch aerators require a ilow of liquid from such faucet or other supplyof liquid at a fairly rapid rate before the liquid can be mixed with asullcient amount of air to, achieve aeration. Such conventional aeratorsare thus inherently ineflicient under such conditions and, where theavailable supply of liquid is limited available only at very lowpressures, cannot achieve desirable degrees of aeration. Thus, forexample, in older buildings where the water supply systems haveaccumulated considerable quantities of clogging substances therein so asto produce a substantial pressure drop during the flow of watertherethrough, the water available from such systems is often to be hadonly at a very low rate of ow. When used with such systems,clonventional aerators are either Very ineflicient in producing aerationor produce no aerationV at all.

Hence, it is an object of the present invention to provide a detdcewhich tends to insure aeration of the liquid supplied thereto eventhough Athat liquid is supplied at a pressure or rate lower than that atwhich a conventional aerator is operable according to arrangementsheretofore employed.

' Another object of the present invention is to provide a means forincreasing the etlicienoy of a conventional aerator.

Another object of the present invention is to provide a device capableof the alternate production of a conically directed spray or an axiallydirected aerated stream of a liquid such as water, said axially directedaerated stream being disposed centrally of the outlet for said conicallydirected spray.

Another object of the invention is to provide a device of the characterlast-described which has improved means for preventing leakage betweenthe spray producing means and the aerated stream producing means. f

.Another object of the invention is to provide a device' Patented .lune27, 1961 of the character described in the form of an extremely compactunit which is easily installed for operative use and easily assembledand disassembled, as desired.

A further object of the invention is to provide a device of thecharacter described which may be easily installed upon a householdfaucet, shower outlet, .pipe and the like and which may be swivelled soas to direct the liquid issuing therefrom where desired.

A further object of the invention is to provide a device incorporatingmeans for diverting a supply of water thereto from :a spray outlet to anoutlet for an aerated stream and vice versa.

A further object of the invention is to provide a device of thecharacter last-described which is automatically selfcleaning.

Yet a further object of the invention is to provide a means forproducing alternately a liquid spray or an raerated stream, which deviceis simple and strong in design and economical to manufacture.

Other objects and advantages of the present invention will becomeapparent from the following description as read in connection with theaccompanying drawings.

Inthe drawings:

FIGURE l is a cross-sectional view of one embodiment of the inventionwherein the spray forming means is in an open position and available todeliver a conical spray;

FIGURE 2 is a crosssectional view taken about the line 2 2 of FIGURE l;

FIGURE 3 is a cross-sectional view taken about the line 3--3 of FIGUREl;

FIGURE 4 is a cross-sectional view taken about the line 4--4 of FIGUREl;

FIGURE 5 is a cross-sectional view similar to that of FIGURE 1 butshowing the spray forming means in a closed position and the aeratedstream producing means in an open position and available to deliver anaerated stream;

FIGURE 6 is a cross-sectional view taken about the line 6 6 of FIGURE 5.

Similar numerals are employed to indicate similar parts throughout thevarious views.

As shown in the accompanying drawings, one embodiment of the presentinvention comprises a coupling, generally designated by the numeral 10and provided with external threads 11 engageable with a faucet (notshown) or pipe (not shown) such as is employable conventionally tosupply water as to a shower head. The coupling 10 is formed integrallywith a ball member 12 which is received within a sleeve 13 threadedlyengaged with a housing 14. The ball member 12 is secured within thesleeve 13by a springable retaining ring 15 which is seated Within anannular groove 16 formed in the sleeve 13.

The sleeve 13 and housing 14 are 'swivelable about the ball member 12,the outer periphery of said ball member 12 being maintained in contactwith an O-ring 18 and washer 19, the said O-ring being seated within anannular groove 20 provided in the sleeve 13'. The washer 19 is seatedupon an annular Ishoulder 21 formed in the upper portion of the housing14.

A circular channel 22 is provided in the ball member 12, said channel 12receiving a supply of water from the coupling 10 and faucet or pipeengageable therewith as aforesaid.

The channel 22 directs the water into a hollow inner pin 23 providedwith a pair of diametrically opposed lower slots 24 and a flange 25. Thehollow pin 23 is slidably contactable with a concentnically disposed,hollow outer pin 26 which is received within an axialv aperture 27formed in the housing 14.

, The outer pin 26 is provided with a pair of diametricral-k 1y 'opposedcircular apertures 29 which are alignable with 3 the aforesaid lowerslots 24, as shown in FIGURES l, 2 and 3 of the drawings.

The apertures 29 also communicate with a circular mouth 30 provided atthe lower end of the housing 14. This mouth 30 also receives a taperedportion 31 of the outer pin 26 and an expanded cylindrical portion 32 ofsaid outer pin 26, the said expanded cylindrical portion beingcharacterized by a plurality of inclined notches 33 adapted to form aconical spray in cooperation with the periphery of the mouth 3i) whensaid expanded cylind-rical portion 32 is in ,the raised positiondepicted in FIGURES 1 and 2, water being supplied to said notches 33 inthe manner hereinafter explained.

The expanded cylindrical portion 32 of the outer pin 26 is alsothreadedly engaged with an aerator, generally designated by the numeral34. The said aerator is provided with a barrel 35 formed with aplurality of airadrnitting apertures 36 and a hollow apron 37.

The `apron 37 is provided with an annular ange 40 seated upon the upperend of the barrel 35, the said apron 37 also being provided with anannular shoulder 41 supporting a perforated disc 42 which, in turn,supports a bale 43 disposed below said perforated disc 42. The bae 43 isdisposed within a mixing chamber 44 communicating with an outletaperture 45 in said barrel by way of a screen 46.

As shown in FIGURES l, 2, and 6 of the drawings, the inner pin 23 andouter pin 26 are vertically adjustable with respect to each other andwith respect to the housing 14 by means of a cam member generallydesignated by the numeral 48, The cam member 48 includes a shaft 49disposed transversely of the housing 14 and threadedy engaged with arotatable handle 50. The shaft 49 is also formed integrally with a firstannular flange 51 abuttable against a shoulder 52 formed at one end of athreaded aperture 53 provided in the housing 14. Said annular ange 51 isalso formed integrally with a raised circular head 54 which abutsagainst the outer pin 26.

The head 54 is also provided with a irst eccentric 55 and a secondeccentric 56. These eccentrics 55, 56 are received respectively in acircular aperture 58 formed in the outer pin 26 and :an upperrectangular slot 59 provided in the inner pin 23. Upon rotation of thehandle 50, the inner and outer pins 23, 26 are vertically movablebetween the raised position depicted in FIGURES l and 2, correspondingwith the raised position of the eccentrics S5, 56, and the loweredposition depicted in FIGURES S and 6, corresponding with the loweredposition of said eccentrics 55, 56, the shaft 49 being rotated 180degrees between said ra-ised and lowered positions of the eccen- D trics55, S6.

The operation of the above-described embodiment of the invention canbest be understood from the following explanation It will be seen from`the drawings that water owing through the channel 22 will be introducedinto the inner pin 23. When the inner pin 23 is in its raised position,as depicted in FIGURES l and 2, the circular apertures 29 of the outerpin 26 are aligned with the lower slots 24 in the inner pin 23, therebypermitting the Water in the inner pin 23 to flow through said lowerslots 24 and apertures 29 into the mouth 30 of the housing 14 fromwhence said water is formed into a conical spray by the notches 33provided upon the expanded cylindrical portion 32 of the outer pin 26,the said expanded cylindrical portion 32 being disposed in contact withthe periphery of said mouth 30 when said inner and outer pins 23, 26 arein their raised positions. In these positionsalso, the ange 25 iswithdrawn into an annular cavity 58 formed in the outer pin 26, saidange 25 being slidably contactable with the circumferential periphery ofsaid cavity 58. Such Withdrawal of the ilange 2S, as well as theslidable contact between the inner and outer pins 23, 26 prevents anyleakage of water from the inner pin 23 into a circular chamber 60provided in the outer pin 26 below said ange 25 and above the aerator34.

Thus in the withdrawn position of the flange 25, it acts as a closureelement and only a conical spray is available from the notches 33.

However, when the inner pin 23 is lowered to the position depicted inFIGURES 5 and 6, as by rotating the handle degrees from the abovedescribed raised position of the eccentrics 55, 56, the slots 24 of theinner pin 23 are displaced with respect to the apertures 29, the secondeccentric traveling vertically a greater distance than the firsteccentric 55. With such displacement, the apertures 29 communicate withthe outer periphery of the inner pin 23 and the slots 24 communicatewith the inner periphery of the outer pin 26, thereby sealing saidapertures 29 and slots 24 against the flow of water from the inner pin23 to the mouth 30 of the housing 14 and the spray-forming notches 33.

However, the said lowered position of the eccentrics 55, 56 projects theange 25 out of the annular cavity 58 so that said slots 24 are disposedwithin the chamber 60, thereby permitting water to ow from said innerpin 23 into the aerator 34 and out of its outlet 45 in the form of anaerated stream.

Thus, by rotating the handle of the cam member, it is possible to divertthe water received from the channel 22 to the spray forming notches 33or the aerator 34 which is capable of forming an aerated stream of saidwater. In this manner, an axial stream of aerated water, characterizedby a soft, bubbly consistency, may be formed alternately of a conicalspray disposed concentrically of said axial stream.

'I'he housing 14 is sealed against leakage through the transversethreaded aperture 53 by a packing nut 62 and washer or packing ring 61disposed intermediately of said packing nut 62 and the yflange 51, saidpacking nut 62 and washer l61 also receiving the shaft 49 of the cammember.

It will also be noted that an important feature of the invention residesin its means for preventing leakage between the inner pin 23 and theouter pin 26 when said pins 23, 26 are in the previously describedlowered position depicted in FIGURES 5 and 6 of the drawings. Thus, notonly is the eccentric 56 received within the slot 59 of the inner pin 23but said eccentric 56 also contact the lower surface 59a of said slot 59during the downward stroke of the eccentric S6 for the purpose oflowering the pins 23, 26 and contacts the upper surface 5911 of saidslot 59 during the upward stroke of said eccentric 56 for the purpose ofraising the pins 23, 26. Hence, by Virtue of such contact and therotation of the eccentric 56 during said strokes, the slot 59 may berotated between the position depicted in solid lines in FIGURE 4, forexample, corresponding with the raised position of said pins 23, 26, andthe position depicted in dotted lines in FIGURE 4, corresponding withthe lowered position of the pins 23, 26 and designated by the numeral59C.

Since such rotation is substantially different in magnitude than anyrotational movement imposed upon the outer pin 26 by the eccentric 55,said eccentric 55 being slidably received in a circular aperture 64formed in the outer pin 26, the average distance between the slots 24and their adjacent aperture 29 is not only determined by the verticaldistance between said apertures 29 and slots 24 when the pins 23, 26 arein their lowered position but is also determined by the rotationaldisplacement of said apertures 29 with respect to said slots 24 whensaid pins 23, 26 are in their lowered position. This displacement of theapertures 29 with respect to the slots 24 results in a throttling eifectwhich, in conjunction with the slidable contact between the inner andouter pins 23, 26 obstructs leakage of water therebetween when said pins23, 26 are lowered from their raised position In this manner, a maximumsupply of water is made available for the formation of said aeratedstream when the pins 2'3, 26 are in their lowered position.

Another important feature of the invention resides in its means forincreasing the efliciency'of the aerator 34 incorporated in thepresently described device. Thus, when the flange 25 is in its loweredposition, as depicted in FIGURES 5 and 6, it projects within the apron37 of the aerator 34. The circumferential periphery 25a of the iiange 25and the inner periphery of the apron 37 thereby form an annular orificeor reduced area for the flow of water from the slots 24 of the inner pin23. This orice increases the speed of such ow into the aerator 34 and bydirecting said tiow against the inner periphery of the apron 37, causesthe water to rebound against the perforated disc 42. The increased speedof the water, as well as the impact thereof against the inner peripheryof the apron 37 and the perforated disc 42 causes said water to owthrough the perforated disc 42 at a speed substantially greater thanthat otherwise available without said oriiice, the said water therebybeing caused to impinge against the baie 43 with greater force so as tofacilitate mixing thereof with the air drawn through the aerator slots36 and into the mixing chamber 44. Moreover, the said on'iice creates asubstantial amount of atomization and turbulence in the water emergingtherefrom, thereby aiding in the subsequent continuation of theseprocesses accomplished by the baffle 43 in the course of aeration.

It will therefore be seen that even though the channel 22 introduceswater at a low pressure or low rate of ow into the housing 14, theaction of the orifice makes it possible to aerate said water or toaerate it to a greater degree than would otherwise be possible withoutsaid orifice.

Beyond these considerations, it will also be seen that when the outerpin 26 is moved to its lowered position, any debris which may be caughtbetween its expanded cylindrical portion 32 and the periphery of themouth 30 of the housing 14 may be loosened by said movement andsubsequently flushed therefrom by the flow of water to the notches 32when said notches 32 are employed to form the conical spray, asaforesaid.

The aerator 34 may also beunscrewed from the outer pin 26 for cleaningpurposes if desired.

It will be seen from the foregoing that the entire unit is inherentlycompact and that, by reason ofthe movement permitted the sleeve 13 aboutthe ball member 12, said unit may be swivelled in any direction. Thus,for example, if the unit is connected to a sink faucet, its spray, aswell as its aerated stream may be directed to any part of the sink.

It will also be seen that the above described device is simple in designand manufacture and easy to assemble and disassemble.

It is noteworthy that while the above described embodiment of theinvention utilizes an outer and inner pin which are engaged with meansfor vertically moving them with respect to each other and the housing14, it is possible to anchor said outer or inner pin with respect to thehousing without departing from the spirit of the invention.

The embodiment of the invention illustrated and described hereinabovehas been selected for the purpose of clearly setting forth theprinciples involved. It will be apparent, however, that the presentinvention is susceptible to being modified in respect to details ofconstruction, combination and arrangement of parts which may be resortedto without departure from the spirit and scope of the invention asclaimed.

We claim:

1. An improved liquid flow regulating device comprising, in combination:a housing; means for introducing a liquid into said housing; a hollowpin disposed axially within said housing and communicable with saidliquid; a hollow outer pin disposed concentrically of saidfirstmentioned pin; said hollow outer pin being provided with anexpanded cylindrical portion characterized by a pluralityy of inclinednotches; said hollow outer pin being provided with at least onetransverse aperture communicable with at least one transvers slot formedin said first-mentioned pin, thereby defining a channel communieatingbetween the interior of said first-mentioned pin and the externalperiphery of said hollow outer pin; the ysaid liquid owing through saidchannel and said notches to form a conical spray; the said pins beingvertically adjustable with respect to each other by transverse meansreceived within said housing; said vertical adjustment disposing saidtransverse aperture into communication with the outer periphery of saidfirst-mentioned pin, whereby -said channel is closed; said verticaladjustment also disposing said transverse slot into communication with acavity provided in said outer pin and communicating with an aerator; thesaid liquid being diverted through said transverse slot and said aeratorto form an aerated stream; the said notches beingdisposed-concentrically with respect to the outlet of said aerator.

2. An improved liquid flow regulating device comprising, in combination:a housing; means for introducing a liquid into said housing; a pair ofconcentric hollow pins slidably disposed within said housing and engagedwith means for vertically adjusting said pins with respect to eachother; the outer of said pins being provided with an expandedcylindrical portion characterized by a plurality of inclined notches;the said outer pin also being provided with an annular cavity at thelower portion of said outer pin and a depending aerator disposed belowsaid annular cavity; the inner of said hollow pins being provided withan annular ange vertically re-` tractable within and projectable fromsaid annular cavity; the said pins being disposable by said verticallyadjusting means in a iirst position wherein at least one slot providedin said inner pin communicates with at least one aperture provided insaid outer pin and said notches are disposed within an aperture providedat the lower portion of said housing; the said liquid flowing from thesaid inner pin through said slot and apertures to said notches, therebyforming a conical spray; the said annular flange being retracted withinsaid annular cavity during said liquid flow, thereby obstructing liquidow from said inner pin to said aerator; the said pins also beingdisposable by said vertically adjusting means in a second positionwhereby the said aperture in said outer pin communicates with theperiphery of said inner pin, thereby obstructing the aforesaid liquidflow, and the said annular ange projects outside of said annular cavity,the said slot being disposed in communication with said annular cavity,whereby the aforesaid liquid ow is diverted to said cavity and into saidaerator to form an aerated stream disposed axially of said notches.

3. In a liquid ow regulating device including a housing and means forintroducing a liquid into said housing, the combination comprising: apair of concentric hollow pins witihn said housing; the inner of saidpins being communicable with said liquid and provided with a closuremember receivable within an annular cavity formed in the outer of saidpins; the outer of said pins being pro'- vided with an annularlydisposed spray forming means and an axially depending aerator disposedadjacent to said annular cavity; the said pins being engaged withvertically adjusting means received transversely within said housing;the said pins being disposable by said vertically adjusting means to aiirst position wherein at least one slot formed in said inner pinadjacent to said closure member is aligned with at ileast one apertureformed in said outer pin, thereby permitting liquid iow from said innerpin to said spray forming means, the said closure member being receivedwithin said annular cavity when said pins are disposed in said iirstposition, thereby obstructing liquid flow into said aerator; the saidpins being disposable by said vertically adjusting means to a secondposition wherein the said slot is withdrawn from communication with thesaid -aperture and the said closure member is withdrawn from saidannular cavity to permit communication betweeen said cavity and saidslot, thereby diverting said liquid flow from said spray forming meansto said aerator.

4. In a liquid ow regulating device including a housing, means forintroducing a liquid into said housing and a pair of concentric hollowpins vertically adjustable to provide alternately a channel for forminga conical spray :and a channel for forming an aerated stream issuingaxially of said housing, the combination comprising: means disposedtransversely within said housing and provided with a pair of eccentricmembers; one of said eccentric members engaging a slot provided in theinner of said concentric pins and the other of said eccentric membersengaging an aperture provided in the. outer of said concentric pins; thesaid pins being disposed in slidable contact; the said eccentric membersrotating the said slot and aperture laterally with respect to each otherupon rotation of said means disposed transversely within said housing,whereby at least one second slot provided Vin said inner pin and atleast one second aperture provided in said outer pin are alignable toprovide said channel for forming a conical spray and disposable inspaced relation to close said channel; the said pins cooperating uponthe closure of said channel to throttle leakage between said inner pinand said spray forming means.

5. In a device according to claim 4, the said eccentric member engagingsaid slot being contactable with upper and lower surfaces thereof torotate said inner pin with respect to said outer pin when said meansdisposed transversely within said housing is rotated.

6. In a device according to claim 4, the said means disposedtransversely within said housing including a rotatable shaft; the saideccentric members including a iirst circular cam disposed radially ofthe axis of said shaft and a second circular cam disposed radially ofthe axis of said shaft and of the axis of said first circular cam; thesaid first circular carn being engaged with the tirst of said aperturesprovided in said outer pin; said irst aperture being of circularconformation; the said second circular cam being engageable with theiirst of said slots provided in said inner pin; said iirst slot having arectangular conformation; the said iirst and second circular earns beingabuttable against the edges of said iirst aperture and slot to impart arelatively diiierent rotational displacement to the said inner and outerpins.

7. In a liquid iiow regulating device including a housing and means forintroducing a liquid into said housing, the combination comprising: atleast one hollow pin vertically adjustable within said housing andcommunicating with said liquid; the said pin being disposed within asubstantially cylindrical member supporting an aerator; the said pinbeing provided with an annular element receivable within an annularcavity provided in said substantially cylindrical member to obstructsaid flow of said liquid into said aerator; the said aerator beingprovided with a hollow circular apron supporting a perforated disc abovean air and liquid mixing chamber provided in said aerator; the saidannular elementbeing projectable within said apron to permit flow ofsaid liquid into said aerator; the edge of said annular element and theinner periphery of said apron defining an oriiice for the said liquidiiow, whereby the rate of said liquid flow into contact with saidperforated disc and into the said mixing chamber is increased.

8. In a device according to claim 7, the said annular element being inthe form of an annular flange provided at the lower end of said pin.

9. An improved liquid ow regulating device comprising, in combination: ahousing; means for introducing a liquid into said housing; a pair ofconcentric hollow pins disposed within said housing; an aeratordepending from the outer of said pins; the said liquid communicatingwith the inner of said pins and with a closure element provided upon oneof said pins; the other of said pins being provided with a cavitywherein said closure element is receivable to obstruct the flow of saidliquid into a hollow apron provided in s aid aerator; the said housingbeing provided with means for disposing said closure element adjacent tothe inner periphery of said apron, whereby the said closure element'andinner periphery of said apron define an orifice for the iiow of saidliquid, the rate of said flow through said orifice -being greater thanthe rate lot ow at which it was introduced into said housing; the saidliquid impinging upon a perforated disc and a baiiie within said aeratorafter emerging from said oriiice, whereby the said liquid is subjectedto aeration.

l0. An improved liquid iiow regulating device comprising, incombination: a housing; means for introducing a liquid into saidhousing; said liquid introducing means being provided with a ballmember; said housing being swivellably engaged with said ball member; aninner hollow pin disposed axially within said housing, the said liquidbeing received within said inner pin when introduced into said housing;the said inner pin being slidably disposed within a hollow, concentricouter pin; the said outer pin being slidably disposed within saidhousing; the said housing being provided with a transverse cam membercharacterized by a shaft and a iirst and second circular cam formedintegrally with said shaft; said first cam being spaced apart radiallyfrom the axis of said shaft; said second cam being spaced apart radiallyfrom the axis of said shaft and the axis of said first cam; the saidfirst cam bcing engaged with a rst circular aperture provided in saidouter pin; said 'second cam being disposed Within a tirst rectangularslot formed in said inner pin; the said shaft being rotatable to disposesaid inner and outer pins in a raised and a lowered position; the saidinner pin being provided with an annular ange at the base of said innerpin and a pair of diametrically opposed rectangular slots adjacent tosaid annular flange; the said outer pin being provided with a pair ofcircular apertures aligned with said pair of diametrically opposedrectangular slots when said pins are in said raised posi-tion, wherebysaid liquid communicatesrwith the outer periphery of the outer pin andwith a plurality of inclined notches provided upon an expandedcylindrical portion of said outer pin; the said expanded cylindricalportion of said outer pin being received within a circular mouthprovided at the lower portion of said housing, whereby the said notchesin cooperation with the inner periphery of said mouth direct the saidliquid exteriorly of the housing in a conical spray; an aerator alsobeing engaged with said outer pin and disposed axially of said expandedcylindrical portion of said outer pin; the said annular iiange beingslidably received within an annular cavity formed in the outer pin whensaid pins are in said raised position; the said annular flangeobstructing flow of said liquid from said pair of diametrically opposedslots of said inner pin to said aerator when said flange -is receivedwithin said annular cavity; the said ange being lowered out of said`annular cavity and into said aerator when said pins are in said loweredposition; the said pairs of diametrically opposed rectangular slots andcircular apertures being vertically displaced with respect to each otherwhen said pins are in said lowered position, the said circular aperturescommunicating with the outer periphery of the inner pin when said pinsare in said lowered position, whereby said liquid flow to the outerperiphery of said outer pin is obstructed; the said pair ofdiametrically opposed rectangular slots of said inner pin communicatingwith the said -annular cavity when said pins are in said loweredposition, whereby said liquid communicates with said aerator to form anaerated stream of liquid axially of said expanded cylindrical portion ofsaid outer pin; the said outer pin being projected outwardly of saidmouth of said housing when said pins are in said lowered position; thesaid inner and outer pins being rotated with respect to each other bythe said tirst and second circular cams when said pins are moved 9 fromtheir raised to their lowered positions, thereby throt- 2,657,954 tlingleakage of said liquid between said pins. 2,795,462 References Cited inthe Ie of this patent 2,935,265 UNITED STATES PATENTS 5 2,949,242

1,996,545 Knowlton Apr. 2, 19:35

Bletcher et al Nov. 3, 1953 Bletcher et al. June 11, 1957 Richter May 3,1960 Blumberg Aug. 16, 1960

